Before the war, the National Park HQ was a large house used as the administration offices for Acadia National Park. By 2287, it had become a hideout for numerous super mutants, possibly former members of the group that inhabits the Vim! Pop factory.
The site consists of a two-story house, parking lot and a large V-shaped barn. There is a steamer trunk in the wing of the barn closest to the house. The house itself contains numerous meat bags, but little else of note.